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Alarm Handling

CloudEngine 12800 and 12800E V200R005C00

This document provides the explanations, causes, and recommended actions of alarms on the product.
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MSTP_1.3.6.1.4.1.2011.5.25.42.4.2.15 hwMstpiTcGuarded

MSTP_1.3.6.1.4.1.2011.5.25.42.4.2.15 hwMstpiTcGuarded

Description

With the TC protection enabled, if TC BPDUs were received after the number of TC BPDUs received by an instance exceeded the threshold, these TC BPDUs were processed after the TC protection time expires. (InstanceID=[InstanceID], bridgePriority=[bridgePriority])

If the number of TC BPDUs received by the instance exceeds the threshold, any new TC BPDU will be processed after the TC protection time expires.

Attribute

Attribute Description

Alarm or Event

Event

Trap Severity

Warning

Mnemonic Code

hwMstpiTcGuarded

Trap OID

1.3.6.1.4.1.2011.5.25.42.4.2.15

Alarm ID

This is an event trap and does not involve alarm ID.

Alarm Type

This is an event trap and does not involve alarm type.

Raise or Clear

This is an event trap and does not involve alarm generation or clearance.

Match trap

This is an event trap and does not involve the matching trap.

Parameters

Parameter Description
InstanceID Indicates the instance ID.
bridgePriority Indicates the bridge priority.

VB

VB OID

VB Name

VB Index

1.3.6.1.4.1.2011.5.25.42.4.1.19.1.3

hwMstpInstanceID;

hwMstpiBridgePriority

Impact on the System

If the number of TC BPDUs exceeds the threshold, MAC entries and ARP entries will not be deleted immediately, and network topology will not be changed immediately, either.

Possible Causes

The number of TC messages received by an MSTP process in a specified period exceeded the threshold.

Procedure

  • The number of TC messages received by an MSTP process in a specified period exceeded the threshold.
    1. Check whether the network topology flapping occurs.

      • If the network topology flapping occurs, go to Step 3.
      • If the network topology flapping does not occur, go to Step 2.

    2. Run the display stp [ process process-id ] [ instance instance-id ] [ interface interface-type interface-number | slot slot-id ] [ brief ] command to check whether the number of TC BPDUs exceeds the set threshold on the interface.

      • If the number of TC BPDUs exceeds the set threshold on the interface, go to Step 4.
      • If the number of TC BPDUs does not exceed the set threshold on the interface, go to Step 7.

    3. Locate the cause of the network topology flapping and rectify the fault. Then, check whether the alarm is cleared. If the alarm persists, go to Step 2.
    4. Run the stp tc-protection threshold threshold command in the interface view to reset the maximum number of TC BPDUs that the device can process. Then, check whether the alarm is cleared. If the alarm persists, go to Step 5.
    5. Check whether the malicious attack exists.

      • If the malicious attack exists, go to Step 6.
      • If the malicious attack does not exist, go to Step 7.

    6. Locate the attack source and remove the attack. Then, check whether the alarm is cleared. If the alarm persists, go to Step 7.
    7. Collect trap, log, and configuration information, and contact technical support personnel.
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Updated: 2019-04-20

Document ID: EDOC1100039527

Views: 68080

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